Thanks Culzean and MikeC. Seems I was overcharged by AA even for a now obsolete Yuasa battery but I was stuck in lockdown with no battery and pleased that AA arrived and installed it within 2 hours.
jazzblack
As others have said you were stuck - and then you weren't !
That is exactly why I replace a battery as soon as the guarantee is up - especially in my wifes car - don't want her stuck somewhere - when you have a breakdown you are in the hands of others - when you replace early or on time ( just about the time the warranty expires ) you can choose a bargain. A lot of car batteries now come with 4 or 5 year warranty but motorbike batteries ( even the expensive ones only get a 1 year warranty - don't ask me why, but may be because motorbike charging systems are not as sophisticated as car ones ( and maybe vibration ), and even the big bikes ( mine is a vee twin ) only get a 12 A-h battery - so not much spare capacity on it.
There are many online places like Tayna where you can get quality batteries at very good prices ( and due to their large turnover you get a battery that is fresh ) - but I found their prices are probably the best or amongst the best and their delivery is spot on.
As I said earlier the battery is probably the most ignored and mis-understood part of the car, and they normally lose capacity so slowly that it goes unnoticed - it is only when you fit a new one and notice how much faster the engine turns over that you realise... Also modern cars with electrical power steering have to provide over 40 amps when you turn the steering wheel, that is a lot to ask, throw in the large aircon and engine radiator fans, heated screens and mirrors, electric windows ( can draw 20 amps each ).
I would write the date battery was fitted on the top of your battery, that gives you a reminder when it was fitted - and when to replace it ( you or the next owner ).